164 EN MEDUMAT Standard
2
WM 68071 05/2021
7 Description of the modes
In CPR Manual mode, individual mechanical breaths can be
manually applied via MEDUtrigger. This mode is applied at the start
of a resuscitation if the airway is not secured. Algorithms 15:2 and
30:2 are supported in CPR Manual mode. With these algorithms,
15 or 30 metronome beats are emitted in each case, of which the
last 5 sounds have a rising tone frequency and thus announce the
imminent ventilation phase. In the ventilation phase, you
administer the mechanical breaths manually via MEDUtrigger. The
I:E ratio is always 1:1. The set maximum ventilation pressure
(pMax) ensures the safety of the patient.
The CPR IPPV continuous mode is designed for ventilation during
chest compression after the airway is secured and corresponds to
an adjusted IPPV ventilation.
During the analysis of the defibrillator, you can pause continuous
ventilation in order to avoid artifacts in the analysis of the
defibrillator.
The CPR CCSV ventilation mode delivers continuous ventilation
synchronized with the chest compression for an intubated patient
(see "7.3.11 CCSV mode", page 160).
To ensure effective treatment in CPR CCSV mode, the trigger and
the PEEP must be set to suit the patient. You can set the trigger
from Level 1 (very sensitive) to Level 5 (insensitive to autotrigger),
which means that reducing the trigger level ensures that the chest
compression can be detected more easily by the device. In CPR
CCSV mode, the PEEP can be preset by the operator. The default
setting is 3 mbar. In CPR CCSV mode, the PEEP serves to improve
triggering in the case of patients with a low functional residual
capacity (e.g. due to obesity).
Chest compressions during cardiopulmonary resuscitation can be
carried out manually in CPR CCSV mode or by automatic chest
compression devices. By default, CCSV starts with Trigger Level 2
for manual chest compression. When switching to automatic chest
compression, the trigger and the alarm behavior are adjusted
accordingly and the colored assessment in the frequency display is
disabled. The trigger level is set to 3.
If you do not perform chest compressions for an extended period
of time in CPR CCSV mode, the device returns to IPPV back-up
ventilation after the time preset in the operator menu. As soon as
you recommence chest compression, the device automatically
returns to CCSV ventilation.
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